Wikipedia - リュードベリ定数 Rydberg constant

https://doi.org/10.1351/goldbook.R05430
Atomic fundamental physical constant $$R_{\infty} = \frac{E_{h}}{2\ h\ c_{0}} = 1.097\ 373\ 1534\ (13)\times 10^{7}\ \text{m}^{-1}$$, where $$E_{h}$$ is the @H02748@, $$h$$ the @P04685@, and $$c_{0}$$ the speed of light.
Source:
CODATA Bull., 1986, 63, 1. [Terms] [Book]